The English domination in Ireland, which began in the 12th century, ended only at the beginning of the 20th century.

An excerpt from the article 39 facts about Ireland

During this time, there were various uprisings and wars against domination, such as the Irish Nine Years' War in 1594, the Battle of the Boyne River in 1690, and the Irish Revolution in 1798. The English, on the other hand, strengthened their position there all the time; in 1605, the displacement known as the Ulster Plantation (the displacement of Irish Catholics) began, and in 1800, by deed, Ireland and England were merged into a single state, forming the United Kingdom of Great Britain and Ireland.